Left to right: Richard Artschwager, The Discovery of Up and Down, 2008; Ann Hamilton, script q, 2008 (above); script r, 2008 (below); Richard Diebenkorn, Untitled #2, 1993; Richard Artschwager, The Discovery of Right and Left, 2008
Left to right: Richard Diebenkorn, Untitled #2, 1993 (above); Richard Artschwager, The Discovery of Right and Left, 2008 (below); Richard Serra, Paths and Edges #10, 2007; Frank Stella, Untitled, 1971